Electric heating element.



I F. w. MOFFAT. ELECTRIC HEATING ELEMENT.

APPLICATION FILED APR-20,1916- I Patented June 27, 1916.

. 11v vw 7-05.

WfT/VE55E5.

UNITED STATES PATENT OFFICE.

FREDERICK W. MOFFAT, OF WESTON, ONTARIO, CANADA, ASSIGNOR TO MOFFATSTOVE COMPANY OF WESTON, LIMITED, 0F WESTON, ONTARIO, CANADA.

nnncrmc HEATING ELEMENT.

To all whom it may concern:

Be it known that I, FREDERICK W. MOF- FAT, of the town of Weston, in thecounty of York, Province of Ontario, Canada, a subject of the King ofGreat Britain, have-invented certain new and useful Improvements inElectric Heating Elements, of

V which the following is'a specification.

This invention relates to heating elements specially adapted for use inthe broiling oven of an electric stove, and my object is to devise acheap, easily constructed and as sembled element, which is easilyrepaired.

I attain my object by means of the constructions hereinafter describedand as illustrated in the accompanying drawings in Figure 1 is a planview of the improved element; Fig. 2 an end elevation of part of thesame; Fig. 3 a sectional detail of part of the base plate and one of thesupporting bars; and Fig. 4 a perspective detail of one of the guideways or sockets for holding the supporting bars.

In the drawings like numerals of refer- .ence indicate correspondingparts in the different figures.

1 is a metallic base plate which may be of any suitable shape for use inor connection with an oven, though it is understood, of course, that theelement may be used in the open as a hot plate if desired. To this baseplate are secured a plurality of guide ways. These guide ways arepreferably formed of sheet metal and areieach provided with the bottom2, upwardly extending sides 3 and inwardly turned flanges 4 on thesides.

Ends 5 are also formed integral with the resistance 8 is threaded. Thelower edge of the bar is laterally projected preferably in T form to fitthe guide way 9 on to which the bar is fitted. It is evident, of course,

that any undercut form of guide way might Specification of LettersPatent.

Patented June 27, 1916.

Application filed April 20, 1916. Serial No. 92,455.

tactin'g in any way with thebase of the guide way, I preferably form oneach supporting bar between the holes and the T-shaped bottom thelaterally extending flanges 10. The outer guide ways are also providedwith outwardly directed fingers 11 between the holes. The resistancewire at the ends can be passed alternately above and below thesefingers, which keep the wires Where they overlap entirely separated.This arrangement is both simple and effective.

In the drawings the resistance is shown as wound for three heats, but ofcourse any desired form of winding may be adopted.

What I claim as my invention is:

1. In an electric heating element, the combination of a metallic baseplate; a plurality of undercut guideways on said base plate; andsupporting bars for an electric resistance adapted to slide into andengage said guideways. i

2. In an electric heating element, the combination of a metallic baseplate; a plurality of undercut guideways on said base plate; andsectional supporting bars for an electric resistance adapted to slideinto and engage said guideways.

3. In'an electric heating element, the combination of a sheet metal baseplate: sheet metal guideways each formed of a bottom secured to the baseplate and sides formed with inwardly projecting flanges; and supportingbars for an electric resistance provided with T-projections adapted toslide into said guideways.

4. In an electric heating element, the combination of a sheet metal baseplate; sheet metal guideways each formed of a bottom secured to the baseplate. ends adapted to be bent up, and sides formed with inwardlyprojecting flanges: and supporting bars for an electric resistanceprovided with T-projections' adapted to slide into said bination of asheet .metal base plate; sheet metal guideways each formed of a bottomsecured to the base plate, ends adapted to be bent up, and sides formedwith inwardly projecting flanges; and sectional supporting bars for anelectric resistance provided with 'T-projections adapted to slide intosaid guideways and to be held therein by the said ends when the latterare bent up.

7. In an electric heating element, the combination of a metallic baseplate; a plurality of undercut guideways on said base plate; andinsulating supporting bars foran electric reslstance adapted to slideinto and engage said guideways, each bar having a series of holes formedtherein for the passage of' the resistance and the ouside bars havinglaterally and outwardly projecting fingers between the holes.

8. In an electric heating element, a resistance supporting bar ofinsulating material having toward one edge a series of holes therein forthe passage of the resistance, provided with lateral enlargementsadjacent the other edge for engagement with .an undercut guideway, andprovided with a laterally projecting flange at each side below theholes.

9. In an electric heating element, a resist ance supporting bar ofinsulating material having toward. one edge a series of holes thereinfor the passage of the resistance, provided with lateral enlargementsadjacent the other edge for engagement with an undercut guideway, andprovided with 8. laterall 'projectin flange at each side below the olesand laterally" projecting fingers at one side between the holes.

10. In an electric heating element, aresistance supporting bar ofinsulating material having toward one edge a series of holes therein forthe passage of the resistance, provided with lateral enlargements adjacent the other edge for engagement with an undercut guideway andlaterally projectin fingers at one side between the holes.

- igned at Toronto this 10th day of April A. D. 1916, in the presence ofthe two undersigned witnesses.

FREDERICK w.- MOFFAT.

Witnesses: i

J. Enw. MAYBEE, E. P. HALL.

